The Influence of Biomass Cokes on the Microstructure and Thermal Shock Resistance of MgO-C Refractories

doi:10.19691/j.cnki.1004-4493.2024.03.002

China's Refractories ›› 2024, Vol. 33 ›› Issue (3): 9-14.DOI: 10.19691/j.cnki.1004-4493.2024.03.002

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The Influence of Biomass Cokes on the Microstructure and Thermal Shock Resistance of MgO-C Refractories

Patrick GEHRE^1,*, Magzhan KAPESSOV¹, Stefan GUHL², Martin GRÄBNER², Christos G. ANEZIRIS¹

1 Institute of Ceramics, Refractories and Composite Materials, TU Bergakademie Freiberg, Freiberg 09599, Germany;
2 Institute of Energy Process Engineering and Chemical Engineering, TU Bergakademie Freiberg, Freiberg 09599, Germany

Online:2024-09-15 Published:2024-10-30
Contact: *e-mail: patrick.gehre@ikfvw.tu-freiberg.de
About author:Patrick Gehre studied ceramic, glass and construction materials at TU Bergakademie Freiberg (Germany). Since 2008, he has been a research associate at the Institute of Ceramics, Refractories and Composite Materials, where he earned his PhD in 2013 and postdoctoral lecture qualification in 2021. Since 2015, he has been a chief engineer and leads the group of ceramic technologies. His research interests focus on the thermomechanical properties and the microstructure of shaped and unshaped alumina-and magnesia-based refractories with attention to the thermal shock resistance and corrosion resistance as well as the flame spraying technology.

Abstract

Abstract: In this study, biomass cokes from sunflower seed hull (SFSH) and wood pellets (WP) were added to a MgO-C batch (3 mass% C) to replace 1.1 mass% of graphite. After hardening and carbonizing the samples, the influence of the biomass cokes on the microstructure and thermal shock resistance was investigated. The replacement of flaky graphite by carbonized WP and SFSH reduced the bulk density and increased the apparent porosity after pressing and carbonization, but the degree was only marginal. This was confirmed by SEM investigations, where the biomass-coke containing samples exhibited a microstructure with a higher amount of pores between the fine MgO grains. The thermal shock resistance of the porous wood pellet coke containing MgO-C is at the same level as the reference sample but not superior to it.

Key words: MgO-C, carbon, biomass, microstructure, thermal shock

Patrick GEHRE, Magzhan KAPESSOV, Stefan GUHL, Martin GRÄBNER, Christos G. ANEZIRIS. The Influence of Biomass Cokes on the Microstructure and Thermal Shock Resistance of MgO-C Refractories[J]. China's Refractories, 2024, 33(3): 9-14.

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The Influence of Biomass Cokes on the Microstructure and Thermal Shock Resistance of MgO-C Refractories

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